Control of Adaptive Optic Systems Using Transverse Actuators

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Rostam, Mohammad Reza | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 48260 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Jalali, Mir Abbas
Abstract:
Turbulence can distort and corrupt the image in quite a few ways when light from a distance star or another astronomical object enters the Earth's atmosphere. It is inevitable that all images produced by any telescope on ther Earth are blurred by these distortions. Adaptive Optics is a technology used to improve the performance of optical systems by reducing the effect of wavefront distortions: it aims at correcting the deformations of an incoming wavefront by deforming a mirror in order to compensate for the distortion. The research work reported in this thesis presents a solution to the surface shape control problems in a Deformable Mirror system. Our first goal is to derive equations that can be used to describe the motion of a plate in both linear and nonlinear cases. After that, a novel approach is presented for controlling of partial differential equations by using numerical optimization. This method can be applied on dynamic systems as well as static ones. The proposed method also can be used for constrained control problems that there is a limitation for variables such as actuators’ force
Keywords:
Adaptive Optics ; Deformable Mirror ; Sequential Quadratic Programming (SQP) ; Partial Differential Equations ; Constrained Optimization ; Wave Front Distortion

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